Made a mistake with the currency, thanks for pointing that out. Price update, none is selling for 3.33 ref on Outpost and these capes do sell for 1 key too. Proof below:

Selling for 3.55 ref:

http://www.tf2outpost.com/trade/9108686

http://www.tf2outpost.com/trade/9066886 (inactive)

Sold for 3.66 ref:

http://www.tf2outpost.com/trade/9032525

Selling for 3.77 ref:

http://www.tf2outpost.com/trade/9111269

http://www.tf2outpost.com/trade/9145364

http://www.tf2outpost.com/trade/9124166 (inactive)

Selling for 1 key:

http://www.tf2outpost.com/trade/9143677

http://www.tf2outpost.com/trade/9124050

http://www.tf2outpost.com/trade/9134947

http://www.tf2outpost.com/trade/9122468

http://www.tf2outpost.com/trade/9130226

http://www.tf2outpost.com/trade/9144148

http://www.tf2outpost.com/trade/9142522

Sold for 1 key:

http://www.tf2outpost.com/trade/8547166

http://www.tf2outpost.com/trade/9122524

http://www.tf2outpost.com/trade/9044008 (sold 2, left 1)

http://www.tf2outpost.com/trade/8137878 (have 1 add recently)

http://www.tf2outpost.com/trade/8837781

Being offered 1 key:

http://www.tf2outpost.com/trade/9111131

http://www.tf2outpost.com/trade/8797668

Being offered a unique one (1 key) for the genuine one:

http://www.tf2outpost.com/trade/9138153

http://www.tf2outpost.com/trade/8990135 (with minor sweets)